Self-cleaning safety-tread.



of chambered members having antislipping tread-surfaces, said members being separated to form 0penbottom channels for the discharge of dirt, 85c.

5 2. A safety-tread comprising a sheet-metal form having side walls struck up to form a chamber, a plurality of walls subdividing said chamber, and a tread-surface of antislipping material arranged in said chamber and interro locked with its dividing-Walls. 

